Add unreleased section

CHANGELOG.md

@@ -3,6 +3,11 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+v1.1.1
+
+### Added Features
+......
 
 ## v1.1.0
 2022-06-16)